2.2 ProgrammingProgramming Guide 15Parameter DescriptionsThe parameters indicated with "#" must be changed while the VoIP Gateway Card is in the "STOP" status (see"2.3.1 Status Control"). The changes must be followed by a reboot to become effective (see "2.5.1 Reboot").The parameters indicated with "*" must be changed while the card is in the "STOP" status (see "2.3.1 StatusControl"). The changes do not have to be followed by a reboot to become effective.Port Number SettingsVoice CODEC SettingsParameter & Description Default Value Range# H.225 Port No.Specifies the port number for the H.225 protocol (call control)in an H.323 protocol suite.Generally, there is no need to change the default value.1720 1 to 65535# H.245 Port No.Specifies the port number for the H.245 protocol (negotiationof channel usage and capabilities) in an H.323 protocol suite.4 consecutive ports, starting with the specified port, will beused (by default, 1721 to 1724).Generally, there is no need to change the default value.1721 1 to 65532# RAS Port No.Specifies the port number for the H.225 protocol (RAS) in anH.323 protocol suite.Generally, there is no need to change the default value.1719 1 to 65535# RTP/RTCP Port No.Specifies the port number for RTP/RTCP. 8 consecutiveports, starting with the specified port, will be used (by default,5004 to 5011).Generally, there is no need to change the default value.5004 1 to 65528Parameter & Description Default Value Range* Voice CODEC Priority 1st–4thSpecifies the type of CODEC for voice communications.Choose the appropriate CODEC for the network environment(e.g., bandwidth, CODEC conditions of the remote terminal).When using multiple CODECs, set them in an appropriatepriority order.Prior to establishing a call, a negotiation takes place over thenetwork and the CODEC to be used will be decideddepending on the setting of this parameter.For details about relations between bandwidth and CODEC,refer to "Detailed Explanations" in "2.2.3 VoiceCommunication Parameters".1st: G.729A2nd: No default3rd: No default4th: No defaultG.723.1,G.729A,G.711Mu,G.711A